The History of XEmacs

An alternative to GNU Emacs, XEmacs was originally based on
an early alpha version of FSF's version 19, and has diverged
quite a bit since then. XEmacs was known as Lucid Emacs
through version 19.10. Almost all features of GNU Emacs are
supported in XEmacs. The maintainers of XEmacs actively track
changes to GNU Emacs while also working to add new features.

More information about the current and past developers of XEmacs,
as well as some information about the history of XEmacs development
is available within XEmacs by selecting 'About XEmacs...'
from the Help menu. Detailed information
is available in the NEWS
files from each release.